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How to debug python programs in emacs?
I get reference like
import pdb; pdb.set_trace();
but not sure how to use it.
M-x cd to change directory to the location of the program you wish to debug.
M-x pdb. You’ll be prompted with
Run pdb (like this): pdb. Enter the name of the program (e.g.
(Pdb) prompt, type
help to learn about how to use pdb.
Alternatively, you can put
import pdb pdb.set_trace()
right inside your program (e.g.
test.py). Now type
M-x shell to get a shell prompt. When you run your program, you’ll be dumped into
pdb at the point where
pdb.set_trace() is executed.
For me, I needed to replace the default “pdb” with
python -m pdb myscript.py
realgud package (available from MELPA) supports PDB (among a gazillion other debuggers), and has a host of neat features that Emac’s PDB doesn’t have.
The one I like best is the shortkeys mode. Once you start debugging a program, you can press
c etc. right in the source window, instead of having to type these commands in the PDB buffer. It also supports Visual-Studio style keybindings with function keys (
After installing RealGUD, you need to run
M-x load-feature realgud to load it, and you can start